Portable chain-stitch sewing-machine.



L. SALTER.

PORTABLE CHAIN STITCH SEWING MACHINE.

, APPLIGATIONIIILED DEO.19. 1911.

1,053,226, Patented Feb. 18,1913.

2 SHEETS-SHEET 1.

Niven-ma LESLIE SALTER mwwgmwt f L. SALTER.

PORTABLE CHAIN STITOH- SEWING MAGHINE. APPLIOATION ITILED 1330.19. 1911.

1,053,226.- frammed,Feb.1 s,1913.v

. lnvcprr Lssu: LTER v smm Arron M 1 LESLIE SALTER, OF LONDON, ENGLAND.

PORTABLE CHAINSTITCH SEWING-MACHINE.

Specification of Letters Patent.

Patented Feb. 18,1913.

Application filed December 19, 1911. Serial No. 666,728.

To all whom it may concern:

Be it known that I, LESLIE SALTER, subject of the King of G'reat Britainand Ire-.

land, residing at 50 Gopthall avenue, London, England, have invented newand useful Improvements in Portable Chain-Stitch Sewing-Machines, ofwhich the following is a specification.

This invention relates to a portable chain stitch sewing machine, andconsists of the formation of parts to make the machine a chain stitchsewing machine for household.

use.

The essential characteristic of this machine is that the driving camdrives through a back pivoted lever whose lower end engages with anunder lever also pivoted at about its center, which engages a rockinghook looper, so as to produce a horizontal movement on said looper, itslower end being pivoted on an under link which at its view of theeccentric anle for supporting the hand wheel. Fig. 5 1s a cross sectionto show the presser feeding foot with the cam operating it. Fig. 6 is asimilar view to Fig. 5 showing the cam in a position to just lift thepresser feeding foot which is, shown in its extreme position of feed.Fig. 7 is a similar view to Figs. 5 and 6 showing the presser feedingfoot lifted.

The metal frame a is in' the shape of the letter G and in its base a isthe screw 6 which forms the center of the hook lever 72 This hook leverb is actuated by a back.

lever c pivoted at 0 Fig. 4, which is actuated by the driving cam 0attached to the top shaft d engaging with the fiat head 0 the said cambeing driven by two geared wheels d d from the hand wheel c. This leverc terminates with a finger c which engages with a hole b in the lever 6These two levers c and b are kept close to the driving cam by a spring12 underneath the center of the hook lever 5 one end of said springbeing attached to the lever b and the other to the framework.

To the front portion of the hook lever b is attached a rounded part bwhich makes connection with a hook looper f which is pivoted on a link 7of which the outer end is pivotally mounted upon the stud Ffixed to theframework. This hook looper f is supported at its upper portion by anaperture which receives the rounded part 'b of the hook lever 6 movinghorizontally and is thus given a rocking motion about its under linksupported by the pivot f which is part of a rocking link f pivoted atits upper end f on to a standard in the framing, so as to enable it tocatch and then to release the cotton when the needle is in its lowestposition and which thereby forms the chain stitch.

The driving wheel e is mounted on a pin 6 of which a portion of it e ismade eccentric to the outer portion. This is fitted into a sleeve ewhich enables the eccentric portion 6 of the pin e to be moved upward,so as to cause the gearing d al to engage properly with one another.When this en gagement is made the inner eccentric portion of this pin issecured by a screw stud e, the outer driving wheel 6 revolving freely onthe outer portion 6 of this pin.

Upon the upper shaft d at the front end is fitted the feed cam g fromwhich both the needle bar it and the'presser feeding foot la areactuated. Upon the outer face of this feed earn 9 is placed as part ofita disk 9 in a hole in which a bent wire 9 shaped like an 5 forms aconnecting rod from the disk to the needle bar it one end of the wireentering the hole in the cam and the other end being secured to theneedle bar h. This needle bar h works between two guides it over whichare two small plates 72, to allow the needle bar to work freely up anddown.

The needle Z is fixed to the lower part of the needlebar h by means of aclip or stop Z wit-h a screw Z to adjust the needle, and to prevent itslipping from itsv working position.

To one side of the needle bar it is fitted the presser feeding foot 7:,which'is held in a slotm in the frame for it, and oscillates about a pinn fixed to the frame which passes through a-slot n in the presserfeeding foot.

The feeding cam g as it rotates acts'upon part of the presser feedingfoot, thrusting it out where it revolves about the pin a, fixed at theupper end -of the presser feeding foot making an efiective feed upon thework as the presser feeding foot is held down by the spring of. Thepresser feeding foot is also held upagainst the side reaction by aspring n VVhen' this presser feeding foot has completed its feed, thecontinued rotation of the cam 9 comes under an arm m "and thus lifts thepresser foot for its return.

' An adjustment of the stroke laterally of the presser feeding foot iseffected by a screwed stud p which reduces the stroke of the feedlaterally to a minimum.

A spring pressed cam 79 (Fig. 3) working on a "fixed stu'd in the framemay be worked by hand to raise the presser feeding foot by engagementwith the projecting neck 79 out of contact with the work.

"The reel holder 1" is fixed by the under portion of this wire beingbent at r and passed through the upper portion of the machine above theaXle (Z. The cotton,

passes through a guide r and through a tension r down to the needle.

To the main driving wheel 0 is fitted a folding handle .9 which when itis closed causes a spring with a corresponding depression 8 drivingwheel 6 is provided with a depres sion 23 by which a driving band canbe. attached'from an independent ,foot treadle- All the above describedparts with the usual gearing, work in unison to form chain stitch sewingmachine, with fewer parts than heretofore so as to make itcheap inconstruction and portable.

Having thus fully described my inven-i tion, I claim as new and desireto secure by Letters Patent l; A portable chain stitch sewing machine,having in combination, a pivoted rocking hook looper having means at itsupper:

portion for the insertion of a hook lever to' support the same and apivoted joint at its lowest part, a hook lever moving with a horizontalmovement thus supporting the. hook looper, a link below the said hooklooper pivoted at one end to the under pivot of the said hook looper andat the other end pivoted to the framing, the looper being thus given arocking motion in combination with the horizontal movement of the saidsupporting lever, a back leverconnected' with the hook lever, and a cam;

pressed knob s to engage This;

on the driving shaft driving the said back lever.

2. A portable chain stitch sewing machine, having in combination, apivoted rocking hook looper having a hole in its upper part and apivoted joint at its lowest part, an under link pivoted at one end tothe said looper and at the other end to a fixed standard 'in theframing, an under upper hole of the said hook looper to support the sameand to give to it a horizontal movement, a pivoted back lever en agingwith the said-hook lever, and a cam upon the driving shaft to drive thesaid back lever.

3. A portable chain stitch sewing machine, having in combination, apivoted rocking hook looper having a hole in its upper part and apivoted joint at its lowest part, an under hook lever pivoted on a boltin the horizontal framing moving horizontally having at one end a pinengaging in the said hole at the upper part of said hook looper and atthe'other end an aperture, a back lever pivoted on a bolt in thevertical frame engaging by a finger at one end with the said aperture ofthe said hook lever, and having a flat head at its upper end, and a camupon the main driving shaft adjacent to the driving wheel driving thesaid back lever transversely to the vertical back of the machine.

4. A portable chain stitch sewing machine, having in combination, apivoted rocking hook looper having a hole in its upper part and apivoted joint at its lowest part, an under hook lever movinghorizontally engaging at one end with the hole in the upper part of thesaidhook looper, a back lever connected to this hook lever, a cam on thedriving shaft adjacent to the driving wheel operating the said backlever transversely to the vertical back of the machine, and a horizontalcoiled spring about the center of the under hook lever, connected to theunderhook lever and to the framework, to press the upper endof the backlever, through the under hook lever by the connection between saidlevers upon the driving surface of the said cam.

In testimony whereof I have signed my name to this specification 1n thepresence of two subscribing witnesses.

- LESLIE 'SALTER.

l/Vitnesses RICHARD A. HOFFMANN, WALTER CARVER.

pivoted hook lever engaging in the said Gopiesofthis patent may beobtained for five cents eaeh by addressing the Commissioner of Patents,1 Washington, D. G.

